Chrome: We're all prone to the occasional typo and if you're sick of right-clicking to correct mistakes in emails composed in Gmail, ezAutoCorrect fixes the most common blunders automatically.

It works exactly like autocorrect in Word, where it will automatically fix frequent mistakes people make while typing. It currently has a library of around 700 corrections, including commonplace ones like, teh, dont, and thats. There's no support for custom corrections at the moment, but as a singular tool to keep the worst offenders at bay it works well.